<!DOCTYPE html>
<html lang="cn">
<head>
    <meta charset="UTF-8">
    <title>{% block title %}{% endblock %}</title>
    <script src="{{ url_for('static', filename='jquery1.42.min.js') }}"></script>
    {% block head %}{% endblock %}
</head>
<body>
{% block content %}{% endblock %}
</body>
</html>